Ignition timing control system for engines

Internal-combustion engines – Charge forming device – Fuel injection system

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123418, F02P 515

Patent

active

048905925

ABSTRACT:
A system for controlling ignition timing of an engine for adjusting ignition timing at an idling state of the engine. An ignition timing fixing switch is provided to produce a fixing signal for providing a fixed ignition timing. A comparator is provided for producing a vehicle driving signal when quantity of fuel injection is larger than a predetermined value which is sufficient for starting a motor vehicle. An AND gate is provided to respond to the fixing signal to produce a first switching signal and respond to the vehicle driving signal to produce a second switching signal. A changeover switch is provided to respond to the switching signal for providing a fixed ignition timing for the adjustment of the ignition timing and to respond to the second switching signal for providing an ignition timing dependent on operating conditions of the engine.

REFERENCES:
patent: 4104998 (1978-08-01), Fenn
patent: 4426773 (1984-01-01), Nakano et al.
patent: 4553517 (1985-11-01), Andreasson
patent: 4790279 (1988-12-01), Tobinaga et al.
patent: 4827885 (1989-05-01), Nishikawa et al.

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